<template>
<div>
  <!-- 面包屑导航区域 -->
 <el-breadcrumb separator-class="el-icon-arrow-right">
   <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
   <el-breadcrumb-item>商品管理</el-breadcrumb-item>
   <el-breadcrumb-item>参数列表</el-breadcrumb-item>
 </el-breadcrumb>
 <!-- 卡片视图 -->
 <el-card>
   <el-alert show-icon title="注意: 只允许为三级分类设置相关参数" type="warning" :closable="false"></el-alert>
   <!-- 选择商品分类区 -->
   <el-row class="cat_opt">
       <el-col>
           <span>选择商品分类:</span>
           <el-cascader expand-trigger="hover" v-model="selectedCateKeys" :options="catelist" :props="cateProps" @change="handleChange"></el-cascader>
       </el-col>
   </el-row>
   <!-- tab 页签区 -->
    <el-tabs v-model="activeName" @tab-click="handleTabClick">
    <el-tab-pane label="动态参数" name="many">
      <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
         <el-table :data="manyTableData" border stripe>
             <!-- 展开行 -->
            <el-table-column type="expand"></el-table-column>
             <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
                <template slot-scope="scope">
                   <el-button type="primary" icon="el-icon-edit" size="mini"  @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                   <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                </template>
            </el-table-column>
         </el-table>
      </el-tab-pane>
    <el-tab-pane label="静态属性" name="only">
      <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
         <el-table :data="onlyTableData" border stripe>
             <!-- 展开行 -->
            <el-table-column type="expand"></el-table-column>
               <!-- <template slot-scope="scope">
                  <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable>{{item}}</el-tag>
               </template> -->
             <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
                <template slot-scope="scope">
                   <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                   <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                </template>
            </el-table-column>
         </el-table>
    </el-tab-pane>
  </el-tabs>
 </el-card>
 <!-- 添加参数对话框 -->
 <el-dialog
   :title="'添加'+titleText"
  :visible.sync="addDialogVisible"
  width="50%" @close="addDialogClosed">
  <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
  <el-form-item :label="titleText" prop="attr_name">
    <el-input v-model="addForm.attr_name"></el-input>
  </el-form-item>
  </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
</el-dialog>
<!-- 修改参数的对话框 -->
 <el-dialog
   :title="'修改'+titleText"
  :visible.sync="editDialogVisible"
  width="50%" @close="editDialogClosed">
  <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
  <el-form-item :label="titleText" prop="attr_name">
    <el-input v-model="editForm.attr_name"></el-input>
  </el-form-item>
  </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
</el-dialog>
 </div>
</template>
<script>
export default {
  data() {
    return {
      catelist: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 级联选择框双向绑定
      selectedCateKeys: [],
      //   被激活的页签名称
      activeName: 'many',
      //   动态参数数据
      manyTableData: [],
      //   静态参数数据
      onlyTableData: [],
      //   控制参数的表单数据对象
      addDialogVisible: false,
      //  添加参数的表单数据对象
      addForm: {
        attr_name: ''
      },
      //   添加表单的验证规则对象
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      },
      editDialogVisible: false,
      editForm: {},
      //   修改表单的验证对象
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //   获取所有商品分类
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败!')
      }
      this.catelist = res.data
      console.log(this.catelist)
    },
    async handleChange() {
      this.getParamsData()
    },
    handleTabClick() {
      console.log(this.activeName)
      this.getParamsData()
    },
    async getParamsData() {
      //   console.log(this.selectedCateKeys)
    // 证明选中的不是三级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
      }
      // 证明选中的是三级分类
      console.log(this.selectedCateKeys)
      //   根据所选分类的Id，和当前所处的面板，获取对应的参数
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
        params: { sel: this.activeName }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败!')
      }
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
      })
      console.log(res.data)
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败!')
        }
        this.$message.success('添加参数成功!')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    async showEditDialog(attrId) {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${attrId}`, { params: { attr_sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败!')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    editParams() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败!')
        }
        this.$message.success('修改参数成功!')
        this.getParamsData()
        this.editDialogVisible = false
      })
    },
    async removeParams(attrId) {
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 用户取消删除
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除!')
      }
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attrId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败!')
      }
      this.$message.success('删除参数成功！')
      this.getParamsData()
    }
  },
  computed: {
    //   如果按钮需要被禁用，则返回true,否则返回false
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    // 当前选中的三级分类的Id
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    // 动态计算标题的文本
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    }
  }
}
</script>
<style lang="less" scoped>
.cat_opt{
margin: 15px 0;
}
.el-tag{
    margin: 10px;
}
</style>
